cat /opt/ossec/logs/alerts/alerts.log

** Alert 1468897672.2164786: mail  - syslog,errors,
2016 Jul 19 11:07:52 localhost->/var/log/httpd/error_log
Rule: 1002 (level 2) -> 'Unknown problem somewhere in the system.'
[Tue Jul 19 11:07:50.911154 2016] [:error] [pid 7373] [client 192.168.129.1:54054] PHP Warning:  date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/html/analogi/detail.php on line 547, referer: http://192.168.129.128/analogi/